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Análise sensorial da couve de folha crespa (kale) cultivadas em sistema convencional e hidropônico
(Universidade Federal de São Carlos, 2020-09-28)
Silva, Lorena Caroline da
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Verruma-Bernardi, Marta Regina
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https://lattes.cnpq.br/3470912236544684
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https://lattes.cnpq.br/9603716889997891
The objective of this work was to evaluate sensory characteristics of kale cultivated with organic fertilizers, control without fertilization and in a hydroponic system. The sensorial analysis of the plant at 60, 90 and 120 days was analyzed. The treatments were as follows: A = Kale without fertilization; C and E = with organic fertilizers and F = grown in a hydroponic system. It was found that for the sensory ordering tests, it was found that there was no significant difference between the treatments for the attributes aroma, sweet and bitter taste and crispness. There was a significant difference between the treatments for the color, and the color of the hydroponic kale showed the lighter green color. It was found that during the three tests, the evaluators maintained the same scores. As for the preference between kales, the panelists did not notice any difference, even at harvest 1, when the panelist indicated difference between the kale for the color attribute, where the kale in hydroponic system showed a lighter green color. The results of acceptance tests for kale for color, flavor, texture and overall impression showed no difference between treatments.
O discurso midiático brasileiro sobre propostas de regulação da própria mídia de 2010 a 2016
(Universidade Federal de São Carlos, 2020-09-28)
Santos, Wilson Ricardo Barbosa dos
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Sargentini, Vanice Maria Oliveira
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https://lattes.cnpq.br/1406919572611392
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https://lattes.cnpq.br/0028226372069896
This thesis discusses, describes, and analyzes the manifestation of meaning regarding media regulation, the regulation discourse’s conditions of emergence, and the discursive formations in conflict when addressed by these medias’ written texts, from January 2010 to December 2016. Our base is the French discourse analysis from Michel Foucault (2006; 2009; 2010) and Michel Pêcheux (2008; 2009b). In general, the media texts which addressed the possibility of their own regulation created “commentaries” (FOUCAULT, 2006) about the subject and the politicians who discussed the possibility (or not) of talking about it, multiplying the meaning of statements such as controle social da mídia, regulação da mídia, democratização da mídia and regulação econômica da mídia. These discourses addressed what is conceived as freedom of speech; moreover, they were related to intense changes in terms of politics, society and, mainly, technology. Considering two presidential elections (2010 and 2014), as well as transformations in the political scene with the irruption of Brazilian president Dilma Rousseff’s impeachment (2016) and Jair Bolsonaro’s election (2018), the theoretical-methodological basis and the analysis of media’s texts allowed us to describe discursive regularities and, therefore, outline elements of a short-term history about the right to speak freely in Brazil in the 21st century. We observed this occurred in different processes of attribution of the right to speak, related to the following events: i) the maintenance of the rights of speech, historically attributed to oligarchies, in which the possibility of emergence of the media regulation discussion in the electoral presidential political discourse was often related to the conservative media’s interpretation; ii) resistance movements to this hegemony in the progressive media, generating dissidence about what could have been the media regulation; iii) the silencing of this discussion with Michel Temer’s arrival (2016) at the presidency, as well as transformations in the production of meaning, especially about the limits of freedom of speech with Jair Bolsonaro’s (2018) election. To this end, we analyzed surfaces of emergence of Brazilian’s media written discourse, with the following distinct characteristics: i) media known as conservative, with broad distribution: the newspapers Folha de São Paulo and O Globo, as well as Veja magazine; ii) media considered as progressive: the newspaper Carta Capital, and the electronic portal Carta Maior. The objective was therefore to demonstrate the conditions of emergence of Brazilian media’s discourse about its own regulation, through the verification of the discursive-enunciative modalities in conflict in the written media, from January 2010 to December 2016. Specific objectives were also developed, which addressed the nature (defended positions, textual genres, types of media) of these circulations, and the degree of use of certain linguistic-discursive resources. The analysis related the effects of meaning generated to the mechanisms that were utilized, the regularities presented considering the textual genres (news, opinion articles, and editorials) and their means of circulation (journals, magazines, digital portals etc.).
ADAM10 como biomarcadora de Transtorno Neurocognitivo Leve
(Universidade Federal de São Carlos, 2020-09-28)
Vatanabe, Izabela Pereira
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Manzine, Patricia Regina
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https://lattes.cnpq.br/6348503930553992
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Cominetti, Márcia Regina
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https://lattes.cnpq.br/3725318894555272
Mild cognitive impairment (MCI), in the absence of dementia, and associated with physical frailty gave rise to the new concept called cognitive frailty. This new concept has also been considered as a subtype of frailty. Moreover, along with the aging process and its interaction with physical frailty, it accelerates the cycle of functional decline and results in poor quality of life and other negative outcomes in older adults. Previous studies have suggested that MCI may represent a condition that predates Alzheimer's disease (AD), based on the high conversion rate for it. With that in mind, the principal aim of this study was to evaluate whether the platelet and plasma levels of ADAM10 could act as biomarkers of the concomitant conditions of MCI and physical frailty, in order to support the new construct of cognitive frailty. The study was carried out with a population aged over 60 years old who were in the coverage of a family health center in the city of São Carlos-SP, Brazil. The subjects were properly assessed for cognition and physical frailty. Subsequently, biological samples were collected, analyzed and stored in a biorepository. The levels of platelet and plasma ADAM10 were analyzed using the Western blot technique in subjects with MCI, compared to subjects without the presence of cognitive impairments, both with and without the presence of frailty. The results indicate that ADAM10 levels are reduced in platelets and increased in plasma of older adults with MCI when compared to healthy controls, regardless of the condition of physical frailty. Based on the results obtained, this study raised the hypothesis that the plasma and soluble form of ADAM10 would be inactive, whereas the platelet form, anchored to the cell plasma membrane, would be active. Thus, we also aimed to assess whether the enzymatic activity of ADAM10 is dependent on its anchoring to the plasma membrane through the evaluation of the enzymatic activity of ADAM10 after the isolation of different fractions of SH-SY5Y neuroblastoma cells. Due to the worldwide pandemic scenario, the enzyme activity assay in cell fractions could not be completed, however a previous study carried out by this research group proved that ADAM10 found in plasma is enzymatically inactive, whereas the platelet form of the protein, was shown to be active, confirming our hypothesis that the reduced levels of active ADAM10 (60 kDa) are related to the condition of MCI, as well as the increased levels of inactive ADAM10 (50 kDa). Taken together, the results demonstrate that ADAM10 cannot be considered as a biomarker in conditions of cognitive frailty, but can act effectively as a low-cost, easy-access and low-invasive biomarker molecule for MCI. These results contribute to a better understanding of the biology of the molecule, as well as for the implantation of tools that promote the diagnosis of MCI. Furthermore, the evidence may guide the health teams to a more adequate planning, with the purpose of improving the quality of life of the older adults affected by this condition, and to direct therapeutic strategies and the prevention of injuries.
A decolonialidade na mediação da informação: uma análise dos trabalhos apresentados no GT3 ENANCIB
(Universidade Federal de São Carlos, 2020-09-28)
Andrikonis, Juliana Buzinaro
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Gracioso, Luciana de Souza
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https://lattes.cnpq.br/4898201916360294
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https://lattes.cnpq.br/2121898429151597
Librariansihp and Information Science recognizes the need for a controlled vocabulary for identifying and treating information; however, as is expected from a democratic informational society, the need for subject areas expansion and adaptation of those areas in relation to new technological, social and cultural issues, is inevitable. In this sense, this undergraduate theses proposes to discuss, through an exploratory bibliographic research, and analyzed from a quali-quantitative perspective, what are the publication tendencies on ENANCIB, based on the theme of “decoloniality”. The analisys will be divided into two stages: first, we will survey the occurrences of themes that represent the decolonial theme in works published in all GTs, within the time frame of the last 5 years of the event (2016-2021); secondly, we will carry out a semantic analysis focusing on the GT3, aiming to make a comparison between both analysis. From this angle, we find that the decolonial theme is debated in a fragmented way in respect to possible subjects of subcategories, coupled to social guidelines, specially in subjects relating to resistence, gender and race, which is the most occuring theme in the GTs that focus on human sciences approaches. After the data analysis, we found that there’s an urgency in propagating the term “decoloniality” in Librarianship and Information Science, having in mind the cultural and social effects and scientific delay which colonialist acctions perpetuate, not only for information users, but also for all professionals, researchers and natives of a non colonial euro-american living standard. In this sense, we seek to point out the relationship between the usage of decolonial terms for visibility of subaltern bodies and themes that are affected by it, such as LGBTQIA+ people, women, black and indigenous people, among others, in GT3 publications. With that, we identified that the decolonial character, even though not always explicitly, marks the Information Mediation studies in its capability to rethink a plural, more inclusive Librarianship and Information Science, which reverberates both in sociocultural and academic spaces, from validation of different knowledge.
Contribuições da cromatografia circular de Pfeiffer para a análise da saúde do solo
(Universidade Federal de São Carlos, 2020-09-28)
Barros, Carlos Eduardo
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Franco, Fernando Silveira
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https://lattes.cnpq.br/3218633711361955
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https://lattes.cnpq.br/3965962521923840
Soil depletion is a process resulted from the management adopted by agriculture activity which consequently causes an ecological and social crisis. In the midst of such a context, agroecology as a movement, science and practice, values the diversification of food production while respecting the edaphoclimatic conditions of ecosystems. To apply this agriculture proposal, it is essential methods that assess the impacts on soils resulted from practices adopted in agro-ecosystems. Pfeiffer chromatography is a diagnostic tool, which is a method considerably simple and low-cost. This article aimed to understand the state of soil health in four different land-uses in a certified biodynamic site: an agroforestry system, a banana plantation with green manure, a fallow area and a forest fragment in the State of Sao Paulo, Brazil. For this, the Pfeiffer chromatography method was used and soil physical-chemical attributes were examined. The qualitative and quantitative outcomes obtained are enough to affirm that the soils of the fragment area and the agroforestry system are healthier than those of the banana area with green manure and fallow. Chromatography was a sensitive and efficient method to analyze the health of tropical soils, with the potential to be used by rural families.
(De)formados pela pele: a escola-periférica e a escola-excepcional fragmentada como (re)produtoras de desigualdades
(Universidade Federal de São Carlos, 2020-09-28)
Basílio, Ana Carolina Paula
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Martines, Marcos Roberto
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https://lattes.cnpq.br/5317839291904450
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Carril, Lourdes de Fátima Bezerra
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https://lattes.cnpq.br/0328730975862213
The present work problematizes the “public school crisis” narrative in the light of notions of peripheral school, exceptional school and fractal school. Based in participatory action research, it was followed the routine of two state schools, located in the periphery and the central region of the city of Sorocaba, state of São Paulo. Along the research and the daily sharing with the students, it was identified that their bodily marks: race/ color, social class, gender, geographic location, family relationships etc., are fundamental to the analysis of school performances, and that in the process of social production of urban space, markedly fragmented and racialized, state schools “shatter” themselves, keeping within them not only classist but racial differences. The discussion about the fragmentation of the state schools, in a racial perspective, opened wide that the “crisis of the public school” has, historically, a color and an address, affecting mostly the peripheral school – black and in the periphery.
Propriedades magnéticas em filmes finos de MoS2 produzidos pelo método de esfoliação em solvente
(Universidade Federal de São Carlos, 2020-09-28)
Fonseca, Raphael Garcia Moraes da
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Oliveira, Adilson Jesus Aparecido de
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https://lattes.cnpq.br/4640148190073166
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https://lattes.cnpq.br/4518058573396923
In this work, thin films of molybdenum disulfide 2D (MoS2) were prepared at different temperatures (15, 25, 30 and 45 ° C) using the solvent exfoliation method. This process produces changes in the morphology and structure of the crystal lattice, and as a consequence, changes the magnetic properties of these films, in particular the magnetic anisotropy. The samples were characterized morphologically and structurally using techniques of Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and High Resolution (HTEM), Raman Spectroscopy and X-ray Excited Electron Spectroscopy (XPS). The magnetic properties were investigated by the Vibrating Sample Magnetometry (VSM) technique, using a magnetometer with SQUID sensor. Our results show that the origin of the changes in the magnetic properties are due to several defects of vacancies of atoms found in the prepared films. A modified Hubbard model was proposed to adjust the magnetic data from measurable parameters associated with the electrons pinning in the vacancy and defects of the MoS2 samples. The changes in the magnetic anisotropy of the samples were investigated as a function of the external magnetic field applied in different directions and the results were discussed in terms of the energy balance of the spin-orbit interactions and the electronic orbital angular momentum with the crystalline field of the vacancy defects located on the zigzag edge of the MoS2 few-layer films.
Culturas colaborativas e inclusão escolar: limites e potencialidades de uma formação continuada centrada na escola
(Universidade Federal de São Carlos, 2020-09-29)
Silva, Maria do Carmo Lobato da
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Mendes, Enicéia Gonçalves
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https://lattes.cnpq.br/3897627554738983
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https://lattes.cnpq.br/3475922880632267
Collaborative pedagogical work has been highlighted as one of the necessary conditions and strategies for improving the schooling processes of the target audience of Special Education, as well as being a powerful space for the professional development of school teams. The challenge for research is to find out how to provide training to promote collaborative work at school. The present study was based on the following questions: a) Continuing education centered on the school, focusing on collaborative work in teaching teams, could enhance the development of inclusive pedagogical strategies and practices in common classes? and b) What limits and potential would this training program have to foster collaborative teaching cultures aimed at schooling the target audience of Special Education? Based on these questions, we established the following objectives: Develop, implement and evaluate a Continuing Education Program focusing on collaboration between teaching teams in order to foster collaborative school culture and enhance inclusive pedagogical strategies and practices. It was a study based on the qualitative approach and assumptions of collaborative research. Nineteen professionals from a public school in a municipality in the state of Amapá-AP participated, of which 15 were teachers from the common classes, the teacher of specialized educational assistance, the one from the reading room, the educational caregiver and the school manager. The training program involved three thematic axes, distributed in seven meetings, totaling 30 hours, through a training model centered on the School, and descriptive and interventional training tools were used. Based on the reasoned analysis of the data, five categories of analysis were derived: 1) The structural and organizational dimension for the development of collaborative work from the perspective of school inclusion, 2) The pedagogical dimension of collaborative work for school inclusion, 3) The dimension formative of collaborative work: contributions to the professional development process, 4) Evaluation of the training program and, finally, 5) Considerations about the sustainability of collaborative and inclusive practices. The results showed that the descriptive formative tools of school culture and pedagogical practices showed the reactions and the way in which each experienced the reality of the presence of students targeted by Special Education within the school, and was related to knowledge, interactions and relationships professionals they established with their peers, and with the pedagogical conditions and support offered in the work environment. The formative strategies of intervention in the pedagogical concepts and practices focused on reflections on conceptions, attitudes and pedagogical strategies based on principles of universal interventions aiming at the quality of teaching for all students. The evidence allowed us to conclude that the theoretical knowledge about collaborative cultures and universal teaching strategies during the training program enabled the teaching teams to build new knowledge, increase expectations of the learning of the public students of Special Education and expand repertoires for the elaboration of collaborative class planning embodied in universal teaching strategies.
Hidrólise controlada das proteínas do leite de vaca com proteases imobilizadas para redução da alergenicidade
(Universidade Federal de São Carlos, 2020-09-29)
Lopes, Laiane Antunes
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Tardioli, Paulo Waldir
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Novelli, Paula Kern
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https://lattes.cnpq.br/0808991927126468
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https://lattes.cnpq.br/0656257053166471
Allergy to cow's milk is clinically an abnormal reaction to cow's milk proteins regulated by immunological mechanisms and which affects mainly children. The partial hydrolysis of these proteins, catalyzed by proteases, offers an efficient way to eliminate, or at least reduce, the allergenic content of milk without significantly affecting its physicochemical and sensory properties. The use of free (soluble) proteases requires thermal inactivation of the enzyme at the end of the reaction, in addition to adding a contaminating molecule to the product. The use of immobilized proteases allows easy separation between enzyme and product and reuse of the catalyst. Multipoint immobilization can also lead to an important increase in the stability of the biocatalyst. In this work, Novo-Pro® D (NPD) and Alcalase® (ALC) proteases were immobilized on 6% agarose support activated with glyoxyl groups (AgGly) and the derivatives obtained were applied to the hydrolysis of cow's milk proteins to reduce allergenic factors in milk. The study of NPD immobilization in AgGly was done, initially, using casein (large molecular weight) and N-benzoyl-L-tyrosine ethyl ester (BTEE, low molecular weight) as substrates. The best results, immobilization yield (YI) of 90%, recovered activity (RA) of 92% (measuring the BTEE hydrolysis) were obtained with immobilization time of 24 h, at 20 ºC and pH 10.0. This derivative was about 20 times more stable than the dialyzed soluble protease, at 50 ºC and pH 6.5, and allowed to achieve a higher degree of hydrolysis (GH) of the casein (26g/L) (40%) than that reached with soluble NPD (34%), under the same reaction conditions. In addition, the derivative could be reused for at least ten batches of 2 hours of reaction. Different strategies were also tested to increase NPD stabilization in AgGly: chemical amination of the enzyme surface before immobilization on AgGly; coating the AgGly derivative with polyethyleneimine (PEI); and partial modification of the glyoxyl groups of the support with carboxylic groups, using glycine to be fixed on the support, and subsequent immobilization and coating with PEI. However, none of these strategies led to greater stabilization than that achieved with the traditional immobilization. Immobilization on chitosan-glutaraldehyde support also did not lead to better results than those already obtained with AgGly. Thus, it followed with the traditional AgGly-NPD derivative and this was compared with the enzyme ALC immobilized on AgGly (AgGly-ALC). The immobilization parameters of ALC and NPD enzymes (dialyzed and non-dialyzed) on AgGly, YI, RA and stability, presented similar values, obtained under the same immobilization conditions. The activities recovered from the derivatives of ALC and NPD were lower when measured with casein hydrolysis, which suggests the presence of a steric impediment in the hydrolysis of this large substrate. In the protein hydrolysis, the higher the degree of hydrolysis (DH), the lower the peptides obtained. However, increasing the degree of hydrolysis to values greater than 5% has also been shown to lead to visible changes in the product. Both derivatives (AgGly-NPD and AgGly-ALC) allowed to obtain approximately 70% of peptides with sizes smaller than 12.4 kDa, for a hydrolysis degree of 5%, suggesting that the main allergenic proteins may have already been sufficiently reduced with this conversion. In the case of soluble protease, in addition to the known disadvantages compared to immobilized protease, there is still difficulty in controlling the final GH, due to the need for inactivating by heating. Regarding the sensory analysis of the hydrolysates obtained, the hydrolysates with 5% DH, obtained with immobilized proteases, showed only small changes in the physicochemical properties of milk, with AgGly-ALC leading to sensory characteristics closer to whole milk than AgGly-NPD. In order to reduce the expected bitter taste that appears in hydrolysis with the generation of hydrophobic peptides in the product, the additions of 5 or 10% of α-cyclodextrin (α-CD) in the hydrolysate with AgGly-ALC were tested, with no reduction in the bitter taste, which suggests that the peptides generated in the hydrolysis of milk did not suit to the cavity of the α-CD molecule. In vivo tests showed that the DH of milk proteins of 5%, with the catalysts AgGly-NPD and AgGly-ALC, allowed to reduce the induction of allergenicity to the milk proteins compared to the in vivo model evaluated, which was not observed with hydrolysates with soluble proteases, which reached higher DH. With the soluble enzyme, although a higher mass percentage of peptides less than 6.5 kDa was obtained, the heating of the milk until the enzyme inactivation (from 50 °C to 90 °C) may have led to the exposure of hidden epitopes or to the appearance of new epitopes with protein denaturation, which induced a greater allergic response of these hydrolysates compared to those hydrolyzed with AgGly-NPD and AgGly-NPD.
O luto e as esferas do sofrimento na pandemia de 2020
(Universidade Federal de São Carlos, 2020-09-30)
Oliveira, Mayra de Fátima Martins de
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Ferreira, Esther Angelica Luiz
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https://lattes.cnpq.br/4054544728456101
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https://lattes.cnpq.br/5936826126406974
The final paper of medical school at the Federal University of São Carlos proposes to be a critical-reflexive narrative that synthesizes experiences lived during graduation regarding learning and medical care. Using knowledge acquired in the activities of the Academic League of Antalgic Therapy and Palliative Care (LATACP-UFSCar) - on grief, communicating bad news, suffering and total pain -, this work seeks to reflect on the challenges faced during the pandemic of COVID-19 in the Brazilian context of political, social and environmental crisis, as well as perspectives for the future and strategies of self-care in this uncertain scenario.
Influência antrópica na qualidade dos aquíferos freáticos da sub-bacia do rio Monjolinho
(Universidade Federal de São Carlos, 2020-09-30)
Arruda, Natália de Souza
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Menezes, Denise Balestrero
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https://lattes.cnpq.br/4329605467080208
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https://lattes.cnpq.br/3968756826294616
The pressure of human activities in water sources results in changes in the environmental quality of river basins. Groundwater aquifers are important reservoirs and feeders for surface water sources. The analysis of rapidly changing geoenvironmental indicators helps to interpret anthropic interference in the quality of groundwater. For the effective management of water sources, it is necessary to study the environmental quality and the possible environmental impacts in strategic regions in the hydrographic basins. The purpose of this work was to investigate possible anthropic interference in the hydrochemical quality of groundwater aquifers in the Monjolinho river basin, upstream of Espraiado water abstraction in the municipality of São Carlos-SP. This section of the basin is inserted in a Protection and Recovery Area of Springs, in a peri-urban region, with high real estate pressure for the expansion of the urban perimeter. Through the detailing of land use and occupation, within the rural and urban areas, paying attention to potentially polluting activities, 28 physical-chemical parameters were chosen, sampled in 7 water tables, in the period of high and low precipitation. From the interpretation of the analysis, it can be noted that the aquifer aquifers Coluvionar and Itaqueri have different hydrochemistry, the aquifer being colluvial with a tendency to more acidic waters and the absence of some metals. Anthropic interference in hydrochemical quality was observed in wells P12, P13, P16, P19, P26 and P41. Well P26 showed high concentrations of N-nitrate. The study identified interference from urban and rural human activities, such as leakage of sanitary sewage and fertilizers in groundwater aquifers in the Monjolinho River sub-basin.
Youtube como ambiente virtual de ensino e aprendizagem: características de aulas-live de espanhol
(Universidade Federal de São Carlos, 2020-09-30)
Batista, Fabiana de Freitas
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Gregolin, Isadora Valencise
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https://lattes.cnpq.br/1015869228676997
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https://lattes.cnpq.br/4433925984902886
This research aims to problematize the potentialities of YouTube as a space for teaching and learning Spanish, before and during the COVID-19 pandemic. To this end, we analyzed the main characteristics of live lessons of the YouTube channel “Espanhol para Brasileiros” (“Spanish for Brazilians”) and the didactic strategies used by the teacher, and also discussed some aspects of live transmissions on the platform as a teaching and learning space, taking into account the interactions between teacher and students through written chat. We started from the assumption that the online transmission of the video lesson in a synchronous way allows interaction (LONG, 1996) among the participants, understood as negotiation of meaning “that generates interactional adjustments by the most competent interlocutor”, in this case, the responsible teacher. The research is characterized as exploratory (GIL, 2008), with data collection of 8 live lessons directly from the YouTube channel, analyzed from 4 sets of techniques described by Moore and Kearsley (2005) as strategies related to: a) Humanization, b) Participation, c) Message style and d) Feedback. In the present research we could observe that in the live lessons there is a predominance of humanization, considering, mainly, the fact that they are live broadcasts. There are strong traits of student participation generating the feeling of being virtually together (VALENTE, 2015). As for the message style, we observed the use of more informal language and a great presence of orality marks in the chat, since they are considered virtual chats in real time (MARCUSCHI, 2005). As feedback is concerned, we observed aspects of evaluation in the form of interaction, attested by Paiva (2003), among which there is positive and negative feedback. The results of the analyses showed that, with social isolation imposed by the COVID-19 pandemic, live transmissions through YouTube intensified as a way to minimize the impacts of isolation, which contributed to consider YouTube as a Spanish virtual teaching-learning environment, considering the techniques used to shorten the distance and bring students closer.
Polipropileno reciclado para contato com alimento: etching e deposição de filmes de carbono amorfo hidrogenado por plasma
(Universidade Federal de São Carlos, 2020-09-30)
Paiva, Robert da Silva
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Cruz, Sandra Andrea
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https://lattes.cnpq.br/9632409046763256
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https://lattes.cnpq.br/8013257464586377
The increasing applications of polymers make this material one of the most consumed in the world market. Accompanying this scenario is the generation of waste, and although plastic has gradually conquered its space as a material of great importance to current society, its disposal is still a problem for the world and especially for Brazil, due to the lack of proper management of solid urban waste (MSW). Among thermoplastic resins, polypropylene (PP) is the one that presents the greatest consumption growth in the last years, which is related to its versatility and good processability, besides its relative low cost. Despite these characteristics, PP still has limited properties, especially in applications that require high barrier properties and transparency, such as food packaging. The use of recycled materials for food contact has some restrictions regulated by international agencies such as the Food and Drugs Administration (FDA) in the USA, European Union directives and the National Health Surveillance Agency (ANVISA) in Brazil. Many studies have been conducted to verify the occurrence of migration of contaminants from these recycled packaging destined to come into contact with food. One of the techniques used to improve barrier properties is surface coating with thin films. This type of deposition can be done by the technique called Plasma Enhanced Chemical Vapor Deposition (PECVD), obtaining hydrogenated amorphous carbon (a-C:H) films deposited on the recycled material. In this work, PP pellets were submitted to a forced contamination protocol, simulating the worst conditions for consumer use of food packaging. Then, contaminated PP went through a process of washing, drying, reprocessing and thermopressing to obtain PP films. The films were exposed to etching plasma surface treatment of oxygen gas, argon and atmospheric air in 2.5 and 5 minutes to increase surface adhesion. Contact angle measurements were performed and surface tension was determined. Morphological changes were determined by atomic force microscopy (AFM), and the chemical modification was evaluated by X-ray (XPS) and FTIR-ATR photoelectron spectroscopy, proving the formation of oxygen and nitrogen based groups. In addition, the a-C:H films were characterized by Raman that proved the majority structure of the PLC type and, the thickness of the films were measured by profiling, allowing the production of films of 100, 300 and 500 nm. The samples were submitted to contact with food simulant liquids and contaminant migration tests, followed by extraction and analysis by SPME-GC-MS, allowing the evaluation of the potential increase in barrier property of these materials. In addition, SEM were made of the films, before and after the migration tests in order to analyze the micro cracks and defects caused by the tests. The results indicate that the migration of contaminants is related to the type of simulant, functional film thickness, as well as the presence of micro effects. However, a-C:H films are a good alternative for the coating of recycled polymers for application in the food area.
Habilidades sociais em adolescentes com indicadores de depressão: uma análise através de métodos multimodais
(Universidade Federal de São Carlos, 2020-09-30)
Santos, Gabriela Trombeta
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Reis, Maria de Jesus Dutra dos
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https://lattes.cnpq.br/8868678989340770
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https://lattes.cnpq.br/5875147172625110
Current literature studies have been found associations between depression symptoms and social skills déficits. Some authors suggest that research in this area could use multimodal methods as a way to deepen our understanding regarding this phenomenon. In this sense, this research aims (1) to investigate the use of participant-generated photographs as a relevant technology to the production of scientific knowledge, and (2) to identify similarities and differences in social skills repertories of adolescents with and without indicators of depression, considering different sexes and social-economic conditions, through the use of self-report instruments and the Photo-Elicitation method. Results of this work were organized in five articles, three of them related to the first aim of this research and two related to the second one. Study 1 is a systematic review regarding the use of participant-generated photographs in research in the mental health field. Study 2 reflects on my experience in using photo-elicitation with adolescents, justifying its use, presenting particularities of the used methodology and discussing its effects regarding participants' experiences and research results. Study 3 addresses ethical and technical issues involved in the analysis of visual data and describes the data analysis procedure developed for this research. Study 4 is a quantitative study that identifies similarities and differences in the repertoires of social skills of 61 adolescents with and without depression indicators using self-report instruments and Study 5 has the same goal, however, it is a photo-elicitation study, seeking for answers through the analysis of photos and interviews of 8 research' participants. Adolescents between 14 and 17 years old, students from public and private schools, participated in the data collection process of Study 4 and 5. Phase 1 included the application of a General Information Script, The Child Depression Inventory, The Level II Pediatric Anxiety PROMIS and The Brazilian Criteria. In phase 2, The IHSA-Del-Prette Social Skills Inventory was applied and the instructions about taking photographs were given by asking the adolescents to take a set of 12 photographs, in a period of two weeks, regarding the question: "How do I see my life now? ". In Phase 3, semi-structured interviews were conducted with each participant to talk about their pictures. According to Phase 1 and 2 data, reported in Study 4, adolescents with depression indicators reported less elaborate social skills repertories than adolescents without indicators. Boys with depressive symptoms reported the most deficient social skills repertoires. Positive correlations were found between participants' social skills and socioeconomic status and between social skills and the presence of concomitant depression and anxiety symptoms. According to Phase 3 data, reported in Study 5, social skills behaviours were associated with adolescents' perceived support and considered a protective factor for depression mainly during stressful life events. Relationships with parents and new school colleagues were the main sources of social skills challenges. Hobbies were found to facilitate adolescents’ engagement in social interactions.
Artificialização do sedimento fluvial em corpos hídricos da bacia do córrego da Água Branca – Itirapina/SP
(Universidade Federal de São Carlos, 2020-10-01)
Toyama, Daniele
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Menezes, Denise Balestrero
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https://lattes.cnpq.br/4329605467080208
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https://lattes.cnpq.br/3375429227573050
The human being, as a modifying agent of the physical environment, causes environmental degradation and the aquatic compartment, including streambed sediments, has a high capacity to accumulate and absorb traces of these changes. Understanding the uses of the hydrographic basin is an important environmental management tool given that the type and intensity of the degradation suffered varies according to the type and intensity of land use. In the present work, an investigation was carried out on the occurrence of the artificialization of river deposits and quantification of this phenomenon considering a core sample of the sediment. For this purpose, collections of core samples were carried out in the rainy and dry season, in locations that covered a variety of uses, and the land use was mapped. For the analysis of the sediment, granulometric separation, degradation of organic matter, visual analysis with a magnifying glass of the thicker material, and analysis of medium granulometry material with a stereomicroscope were performed. Additionally, the finer material was analyzed with a scanning electron microscope, and chemical mapping by dispersive energy spectroscopy and thermogravimetry and differential exploratory calorimetry tests were conducted in order to detect the presence of plastics. It was observed that sedimentation of artificial material occurs in the bed of streams in the study area (macroplastics, construction waste, rubber and cardboard). The most abundant materials incorporated into the sediment profile are microplastics (fragments and fibers). In the thinnest portion of the sediment, anthropogenic microparticles were observed and the presence of some types of plastic (nylon, LDPE and PET) was detected. Areas of more intense urban occupation and with less riparian vegetation suffer more from this degradation and areas of rural use, less. The existing dam in the basin accumulates more materials (both macro and microplastics), also playing the role of preventing these residues from being transported downstream of the water body. The importance of investing in environmental management measures is highlighted, such as environmental education, restoration of riparian vegetation, inspection of environmental legislation, and public cleaning to settle the impacts that poor management of solid waste causes in the aquatic environment.
Gamification based learning activities in elementary Brazilian public school
(Universidade Federal de São Carlos, 2020-10-01)
Ferraz Junior, Wilton Moreira
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Martinelli, Suéllen Rodolfo
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Santos, Carlos Henrique da Silva
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Homem, Murillo Rodrigo Petrucelli
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https://lattes.cnpq.br/4099700446922080
This work presents an iterative method which is based on the serious games development in elementary and high school classes, focusing on the students and teachers experiences from Brazilian scholar reality. Furthermore, it does not require strong background in game development and it is planned to be introduced any area of knowledge. It has been considered as a motivational method to engage the teachers and students' in-depth discussions. It follows some Agile Methods practices, such as the Extreme Programming (XP) and Scrum Agile Methods to guide them along the continuous exploration of game design in classrooms. This method also considers the design patterns techniques to reuse (re-guise) some well-known digital games engines and educational concepts, as example a guided game design based on the spaceships battles to associate electric charges concepts. The results obtained in experiments occurred in public schools show successful acceptance and they contribute to improve the students' academic performance. This method is now introduced in some undergraduate and graduate practices to analyze its impact in entrepreneurship courses.
Fiscalização de contratos: proposta de aprimoramento a partir de um estudo em campi selecionados do IFSP
(Universidade Federal de São Carlos, 2020-10-02)
Cavecci, Juliana Aparecida Ferreira
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Molina, Wagner de Souza Leite
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https://lattes.cnpq.br/5939243693407420
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https://lattes.cnpq.br/7223018894553579
Aiming to identify and classify the weaknesses and virtues of the inspection contracts system in selected campi of the IFSP, in the period from 2013 to 2019, for cleaning and security contracts, this research brings notes about this reality, analyzing positive aspects observed, as well as vulnerability points, which demand improvements, to then, point out suggestions that would benefit the activity. The whole analysis disclose the importance of inspection for the effectiveness of public contracts, in order to seek an adequate execution of services ensuring that the needs of its users are met, for the best use of public resources and to increase the transparency of Public Administration acts. It is also evident the lack of instructions and regulations that establish guidelines within which the inspection would, in fact, be considered adequate. Finally, it is made an approach about the IFSP and Avaré, Boituva and Salto campi, selected for this research, to then perform the analysis of the results obtained, through a survey applied to the contract inspectors, which, in many cases, confirmed the notes found in the literature, that evidence the problem of an inspection contract performance, many times, in the background and concomitantly with other activities executed by these, most of the time, low-skilled workers to perform the function. The methodological strategy of this research focused in the qualitative approach, outlined by action research, of an exploratory nature, using documentary research, participant observation and the application of a semi-structured questionnaire for data collection.
Programa ACT: avaliação de uma intervenção com profissionais para prevenção universal da violência contra crianças
(Universidade Federal de São Carlos, 2020-10-02)
Pontes, Luciana Barbalho
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Brino, Rachel de Faria
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https://lattes.cnpq.br/0235133592567485
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https://lattes.cnpq.br/5100941521054834
The Brazilian “Boy Bernardo” law provides for the elaboration of public policies and the implementation of actions such as professional training programs, in order to prevent the use of physical punishment and to spread positive parenting practices. The first chapter of this thesis discusses that law as an agent of cultural change in Brazil. Professional training on the ACT Program fits perfectly into the scope of the law, as it aims to teach parents and professionals about the consequences of violence, child development, anger management and positive parenting strategies and thus contribute to child abuse prevention. Chapters 2 and 3 aim to evaluate a 21-hour ACT Facilitator Training Workshop through a feasibility and a quasi-experimental study, with pre-test, post-test and one-month follow-up measures. Finally, chapter 4 presents a qualitative evaluation of the program dissemination after two years. As a result, in both quantitative studies, participants significantly increased their knowledge on child development over time, but there were no significant differences regarding their child abuse potential score. The feasibility study also obtained increased knowledge on parenting styles and reduced levels of rigidity after training. The quasi-experimental study found no difference between groups, but it did significantly reduce levels of distress and increase ego-strength levels of professionals over time. Although the rate of program dissemination in the study was zero, the informal dissemination of its content and its integration into their professional practice occurred. Therefore, the ACT Training Workshop proved to be effective in increasing and disseminating knowledge related to violence prevention. However, adjustments are necessary to make the train-the-trainer model and the evaluation of program dissemination work successfully in order to achieve a large-scale implementation of the ACT Program as a public policy in Brazil, in compliance with the law.
Estudo do comportamento mecânico das ligas de titânio beta metaestável TMZF e Ti15%Mo durante processamento termomecânico
(Universidade Federal de São Carlos, 2020-10-02)
Guerra, Ana Paula de Bribean
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Jorge Júnior, Alberto Moreira
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https://lattes.cnpq.br/6360362248108490
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Bolfarini, Claudemiro
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https://lattes.cnpq.br/9231627080617037
Stress-strain curves of two metastable beta titanium alloys, the Ti-15%Mo alloy and the TMZF alloy were evaluated. The curves were obtained from isothermal hot compression tests in a temperature range from 650 to 900 ° C, strain rates between 0.172 and 17.2 s-1 and also under continuous cooling. Hardening and softening phenomena that occurred during hot deformation were evaluated by means of stress x strain curves and microstructural analyzes. Based on the obtained data, constitutive equation’s constants of phenomenological models available in the literature were determined in order to evaluate their stress prediction ability. The evaluated models were the strain compensated Arrhenius equation model, modified Johnson-Cook model and modified Zerilli-Armstrong model. From the microstructural analyzes of the deformed samples, the occurrence of dynamic recovery phenomena was very pronounced, delaying the occurrence of dynamic recrystallization for the highest temperatures under the analyzed conditions. Through the energy dissipation efficiency maps and deformation instability maps it was possible to delimit regions of improved processing efficiency within the evaluated processing conditions. The athermic omega phase was present in all deformed samples; there was no alpha phase precipitation during deformation. It was not possible to obtain a processing condition that would make possible a completely recrystallized microstructure constituted by the beta phase for any of the processing conditions, since the regions of the analyzed samples did not show homogeneity and the recovery by formation of sub-grains occurred preferably in grain boundary regions, where a high density of dislocations was detected.
Representação do corpo do homem negro na dança: visibilidade e racialização acerca do Grupo de Dança Contemporânea "Filhos de Afrodite" Unemat/Cáceres - MT
(Universidade Federal de São Carlos, 2020-10-02)
Baccin, Adriana Nolibos
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Leite Júnior, Jorge
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https://lattes.cnpq.br/7253561448346772
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https://lattes.cnpq.br/4560001203209684
The key point of this research was to identify and analyze the possible conflicts that emerge from the representations of men's bodies in dance, concerning to the differences of gender, race and sexuality. The men who participated in this thesis are part of the contemporary dance group entitled “Filhos de Afrodite” (Sons of Aphrodite) and are/were all academics of the Degree Course in Physical Education at the State University of Mato Grosso (Unemat), University Campus “Jane Vanini” in Cáceres-MT. We have as contribution, to the discussion, the (dis)constructions of masculinity(ies) and femininity(ies), to which the body is genderized and genderizer; the racialization and its imbrications with the sexuality; and, the dance, as a corporeal-social practice historical and culturally systematized. In addition, we intend to think in relation to the constructions of subjectivities, constituents of and about the body of these men. The research is based on constant dialogue with Michel Foucault (2006; 2005; 2004; 1996; 1994; 1987; 1985; 1984) , Judith Lynne Hanna (1999), Raewin Connell (1995a; 1995b; 1993; 1987) Connell and Messerschmidt (2013a), Connell, Hamlin and Vanderberghe (2013b), Connell and Hamlin (2000), Connell and Dowsett (1992), Frantz Fanon (2008); 1980; 1979), Stuart Hall (2005; 2003; 2000; 1997a, 1997b; 1996), among others, which work with dance and the differences marked by racialization, sexuality and the generification of bodies and power relations. As methodological choices, in addition to the updated reference on the themes, strategies were used such as participant observation, questionnaires, conversation circles, and, mainly, field diaries, as well as records of the presentations of the group under study. Race and sexuality, intertwined, led to stigmatization in relation to the body of these men, marking not only the black men of the group as the most sensual and beautiful, reaffirming questions of structural prejudices in relation to the sexualization of the race, but also, the a discussion about the body of these men and the body of the white woman who runs them. Another fundamental issue, which was initially raised, was the affirmation of naturalized gender violence through sexualization with / among the dance group participants, in the Physical Education course at Unemat and in the “evaluations” made by the audience that attended them.